#include <OneWire.h>// Library for communication with OneWire devices
#include <DallasTemperature.h> // Library for the Dallas temperature sensors

#define ONE_WIRE_BUS 7
OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with devices
DallasTemperature sensors(&oneWire); // Pass oneWire reference to Dallas temperature sensor

//DS18B20  temperature sensor
void setup() {
  Serial.begin(9600); 
  sensors.begin(); // Initialize the Dallas temperature sensor
  sensors.setResolution(12);// there are 4 diffrent resulutions to choose from, this determines the temperature increments
  // 9 = 0.5°C
  // 10 = 0.25°C
  // 11 = 0.125°C
  // 12 = 0.0625°C


//assigns the pins 2-4 to be OUTPUT and set to LOW 
  for (int pinNumber = 2; pinNumber < 5; pinNumber++) {
    pinMode(pinNumber, OUTPUT);
    digitalWrite(pinNumber, LOW);
  }

  delay(5000); // Extended delay to allow sensor initialization
}
// Main loop to read temperature and control pins based on temperature range
void loop() {
  sensors.requestTemperatures();// Request temperature from the sensor
 
  float temp = sensors.getTempCByIndex(0);
  if(temp == DEVICE_DISCONNECTED_C) {
    Serial.println("Error: Could not read temperature data");
    return;
  }

  Serial.println(temp); // Print the temperature reading
  Serial.flush();// Clear the serial buffer

// Control pins based on temperature range
if(temp >= 15 && temp <= 25){  // Stabil
    digitalWrite(2,LOW);
    digitalWrite(3,HIGH);
    digitalWrite(4,LOW);
} else if(temp > 25 && temp < 30){ //intermediate step, still "stabil" 
    digitalWrite(2,LOW);
    digitalWrite(3,HIGH);
    digitalWrite(4,LOW);
} else if(temp >= 30 && temp <= 40){  // Hög
    digitalWrite(2,LOW);
    digitalWrite(3,LOW);
    digitalWrite(4,HIGH);
} else if(temp <= 15){  // Låg
    digitalWrite(2,HIGH);
    digitalWrite(3,LOW);
    digitalWrite(4,LOW);
}

  //60 000 ms = 1 min 
  //600 000 ms = 10 min
  delay(6000); // Delay for 6 seconds before the next loop iteration
}